Internal-combustion engine



Aug. 13, 929. P, KALB 1,724,599

INTERNAL COMBUSTION ENGINE Filed May 16, 1927 2 Sheets-Sheet 1 Law/5P/QLB r Tune Aug. 13, 1929. P. KALB 1, 9

INTERNAL COMBUSTION ENGINE Filed May 16, 1927 2 Sheets-Sheet 2 Ch YumaPatented Aug. 13', 1929.

UNITED STATES PATENT OFFICE.

LEWIS P. KAI-B, OF DETROIT, MICHIGAN, ASSIGNOR TO CONTINENTAL MOTORSCOR- PORATION, OF DETROIT, MICHIGAN, A. CORPORATION OF VIRGINIA.

INTERNAL-COMBUSTION ENGINE.

Application filed May 16,

This invention relates to internal combustion engines and refers moreparticularly to means for cleaning air supplied to the engine cylinders.A further object of the invention is to provide means for ventilatingthe crank case and to relieve back pressure in the crank case. Theinvention also provides a simply constructed device capable ofmanufacture in quantity production at in relatively low cost forefiiciently carrying out the above objects.

Other objects reside in the novel combination and arrangement of partsmore particularly hereinafter described.

Referring to the drawings inwhich like reference characters representcorrespondingi parts,

ig. 1 is a side elevation of the engine showing the air cleaner withportions thereof broken away to show the ventilator for the crank case,

Fig. 2 is an elevation view of the front of the engine with a portionthereof in section through the air cleaner and ventilator Fig. 3 is aside elevation view of a portion of the air cleaner with portionsthereof broken away to show the ventilator baf-, fle and Fig. 4 is asectional view along 4-4 of Fig. 3. I

In the drawings reference character A represents the engine having theusual pistons B, valves C, cooling fan D, and exhaust and intakemanifolds E and F respectively all of which parts may in general be ofthe well known construction.

The crank case 10 communicates with the valve chamber 11 the latterhaving a side opening 12 closed by a cover assembly comprising a frontcover 13 and a rear cover 14. The cover assembly is held in position bya series of securing members 15.

The front cover 13 is provided with louvres 16 affording entrance of airfrom the atmosphere into the cover chamber 17, the direction of airentering the louvres being changed as indicated by the arrows thusserving to clean the air, the heavier for- 1927. Serial No. 191,649.

eign particles continuing their directional 5o flow rearwardly of theengine.

The rear cover 14 is provided with one or more holes 18 preferably closeto the front end of the cover serving to establish a certaln amount ofcommunication between crank case 10 and valve chamber 11 on the one handand cover chamber 17 on the other. In order to prevent, as far aspossible, oily vapor from passingfrom the crankcase to the coverchamber, bafiles 19 and 20 are provided, the former restricting thecommunication between the crank case 10 and valve chamber 11 and thelatter being associated with the holes 18.- Air from the cover chamber17 passes to the carburetor G by reason of the conduit or air elbow Hpreferably connected to the cover chamber relatively near one endthereof.

Air currents from the motor fan D pass through the louvers 16, into thecover chamber and thence to the carburetor by wa of conduit H, thesuction in the intake pre erably regulating the amount of air supplied.A slight vacuum is set up in the cover v chamber which draws the airthrough the louvers and also draws a slight amount of air from thecrankcase through the openings 18. The primary purpose of this is torelieve any back pressure which may be set up in the crankcase andincidentally to insure a circulation of oily vapor from the crankcaseinto the valve chamber. Thus a combined air cleaner and crank caseventilator is provided, the valve mechanism being lubricated by the oilyvapor currents set up in the direction toward the cover chamber from thecrank case. 'One important feature of the invention resides in provilingone or more bafiie devices between the c ver chamber 17 and the crankcase .10.

What I claim as my invention is:

1. An internal combustion engine comprising in combination an enginecombustible mixture supplying device, a crankcase, a valve chambercommunicating with said crankcase, said valve chamber having an openingextending longitudinally of the side of the engine, a cover assemblyincluding an outer member provided with louvers opening rearwardly ofthe engine and an inner member substantiall closing said valve chamberopening, sai inner and outer mom- 5 bers forming a cover chamber, meansforming a restricted communication between the cover chamber andcrankcase for ventilating the latter, and means for supplying air fromsaid cover chamber to the said mixture supplying device;

2. An internal combustion engine compris ing in combination an enginecombustible mixture supplying device, a crankcase, a valve chambercommunicating with said crankcase, said valve chamber having an openingextending longitudinally of the side of the engine, a cover assemblyincluding an outer member provided with louvers opening rearwardly ofthe engine and an inner member substantially closing said valve chamberopening, said inner and outer members forming a cover chamber, saidinner member provided with an opening, a baflle restrictingcommunication between the cover 2 chamber and valve chamber, and meansfor supplying air from said cover chamber to the said mixture supplyingdevice.

' 3. An internal combustion engine compris in in combination an enginecombustible mixture supplying device, a crankcase, a valve chambercommunicating with said crankcase, said valve chamber having an openingextending longitudinall of the side of the engine, a cover assemblyincluding an outer member provided with louvers opening rearwardly ofthe engine and an inner member substantially closing said valve chamberopening, said inner and outer members forming a cover chamber, saidinner member 49 provided with an opening, a balfie restrict- 1ngcommunication between the cover chamber and valve chamber, a secondbaflie restricting communication between the crankcase and valvechamber, and means for supplying air from said cover chamber to smmixture su plying device.

4. An interna combustion engine comprising in combination with an enginecrankcase and carburetor, a valve chamber means 50 including a coverassembly operatively associated with the valve chamber and crankcase andadapted to ventilate the crankcase, said means including a member formedwith louvers roviding inertia air cleaning, and

IS! a conduit for conducting the cleaned air to the carburetor.

5. An internal combustion engine comprisc ing in combination an, enginecombustible mixture supplying device, a crankcase, a

valve chamber communicating with said crankcase, said valve chamberhaving an opening extending longitudinally of the side 0 the engine, acover assembly including an outer member provided with louvers openingrearwardly of the engine and an inner member substantially closing saidvalve chamber opening, said inner and outer members forming a coverchamber, means located near one end of the cover assembly forming arestricted communication between the cover chamber and crankcase forventilating the latter, and means connecting the'cover assembly near theother end thereof for supplying air from said cover chamber to saidmixture supplying device.

6. An internal combustion engine comprising in combination with anengine crankcase and carburetor, means including a cover chamberassembly operativel associated with the crankcase and adapte toventilate the crankcase, said means including a member formed withlouvers spaced longitudinally along the engine for the passage of airdirectly from the atmosphere to the cover chamber, and a conduitconducting the air from the cover chamber to the carburetor.

7. In an internal combustion engine the combination with a crankcase andcarburetor, of a valve chamber having an opening along the side of theengine, a cover chamber substantitally closing the valve chamber openingand restrictedly communicating with the valve chamber and crankcase tosubstantially prevent crankcase and valve chamber oily particles frombeing conducted to the cover chamber, and a conduit between the coverchamber and carburetor.

8. In an internal combustion en ine the combination with a crankcase ancarburetor, of a valve chamber having an opening along the side of theengine, a cover chamber substantially closing the valve chamber openingand restrictedly communicating with the valve chamber and crankcase tosubstantially prevent crankcase and valve chamber oily-particles frombeing conducted to the cover chamber, a conduit between the coverchamber and carburetor, and means conducting air directly from theatmosphere to the cover chamber.

9. In an internal combustion engine the combination with a crankcase andcarburetor, of a valve chamber, a second chamber connected with thecarburetor intake whereby a suction is induced in the second chamber,said valve chamber communicating with the crank case, means placing thevalve chamber in communication with the second chamber to relievecrankcase back pressure and to induce a circulation of oil vapor fromthe crankcase to the valve c amber,

said means substantially preventing the crankcase and valve chamber oilyparticles from passing into the second chamber.

10. In an internal combustion engine the combination with a crankcaseand carburotor, of a valve chamber, a second chamber connected with thecarburetor intake whereby a suction is induced in the second chamber,said valve chamber communicating with the crank case, means placin thevalve chamber in communication wit the second chamber to relievecrankcase back pressure and induce a circulation of oil va or from thecrankcase to'the valve 0 am er, said means substantially preventing thecrankcase and valve chamber oily particles from passing into the secondchamber, and means sup lying air directly from the atmosphere to t esecondchamber.

In witness whereof, I hereunto subscribe my name this 12th day of May,A. D. 1927.

LEWIS P. KALB.

